Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 19 of 19 for “"micro-contact printing"”.
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In-process measurement of micro-contact printing
In micro contact printing, a polymer stamp with sub micron features is use to pattern a substrate. Micro contact printing has many applications including micro machined circuits and miniaturized biological test kits. Success in printing has been achieved in limited batch processing of plate to …
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Design and analysis of high-speed continuous micro-contact printing
Micro-contact printing ([mu]CP) is a technology that prints directly off a patterned elastomeric stamp by transferring only a molecular monolayer of ink to a surface, providing a low-cost, high resolution and widely applicable method of nano-scale patterning. Roll to roll is recognized as one of …
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Understanding and developing capabilities for large area and continuous micro contact printing
Micro contact printing is a high spatial resolution-patterning tool that can be used for printing on large and non-planar surfaces because of which it has begun to find important applications in printed organic electronics and fiber optics. However, problems like achieving precise alignment and …
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Design and prototype of an automated system for commercially viable production using micro contact printing
… prototyping a fully automated system employing Micro Contact Printing, an emerging technique for replication and pattern transfer using soft organic materials, for a nano technology based company in Cambridge, Massachusetts during the summer of 2006. The thesis takes the reader through an …
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Design and prototype : a manufacturing system for the soft lithography technique
… attention of the academia and the industry. Micro contact printing is by far the most widely used soft lithography technique in the industry. The objective of this research project is to design and prototype a micro contact printing machine which could achieve high scalability, feature …
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Micro scalar patterning for printing ultra fine solid lines in flexographic printing process
… focuses on the study of ultra-fine solid lines printing by using Micro-flexographic machine which is combination of flexography and micro-contact printing technique. Flexography is one of the famous and high speed roll to roll printing techniques that are possible to create graphic and …
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Sub-20nm substrate patterning using a self-assembled nanocrystal template
… resolution from 2 to 20nm. Spin-casting and micro-contact printing are resolved as methods of forming and depositing these monolayers of quantum dots through self-assembly. Four methods of templated patterning - shadowmasking, lift-off, selective ablation & nano-imprinting - using the quantum …
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Micro- and nano-scale polymer-on-polymer stamping of the polyelectrolytes SPS and PDAC
Micro-contact printing has emerged as a promising new technique for patterning micron scale features with a wide variety of materials. Most of the materials examined have been small, reactive molecules patterned on surfaces they are chemically attracted to, like thiols on metals or silanes on glass …
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Nano-contact printing of DNA monolayers
… devices. To accommodate this development, printing methods are needed. Some printing methods that are used include lithography, micro-contact printing, and inkjet printing. These methods all require specialized instrumentation, hazardous chemicals, and complicated and tedious steps that …
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Design and manufacturing of high precision roll-to-roll multi-layer printing machine : measurement and experiment
… the application of roll-to-roll technology in micro-contact printing was developed. In this research, the prototype machine was upgraded by designing and machining a device that could fabricate a flat stamp with significantly less variance. The print roll wrapping system was reconfigured in …
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Fundamental study of pulse electric field effects on hela cell cultured over extracellular matrix protein micro-patterned surface
… of the cells. This was achieved by using the micro contact printing (μCP) method. The result showed positive respond on the effect of EP on protein printed surface combination where HeLa cells were grown. The 50µm was chosen as the best-pattern size for cell alignment by using fibronectin. …
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Site-specific immobilization of tetrazine-modified green fluorescent protein on trans-cyclooctene surfaces
… this work, has applications within areas such as microarrays, biomaterials, tissue engineering and biosensors. Non-covalent protein adsorption (physisorption), the easiest of all protein-attachment approaches, suffers from several drawbacks and was rejected for this work. Although the covalent …
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Polythiophene als sensitive Filme in chemischen Sensoren
… The advanced electrochemical quartz crystal microbalance was used for investigating the electrochemical polymerisation and the redox cycling behaviour of the polymer films deposited on the liquid facing electrode of the quartz. This method is based on impedance analysis of a piezoelectric …
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Emergent behavior of cells on microfabricated soft polymeric substrates
… consisting of soft polymeric scaffolds at the micro and macro scales. This is owing to their unique ability to generate spontaneous, synchronous contractions either autonomously or under externally applied fields. Most of the biological machine designs reported in literature use single cells or …
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Development of label-free colorimetric plasmonic sensor for biomedical applications
… the deposition of different polymers using micro contact printing and compares the spectral results with the colorimetric properties of the device. Chapter 4 gives a demonstration of detection of drug bindings with cytochrome P450-2J2 using the nanoLCA device. Cytochrome P450-2J2 is the most …
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Engineering the micro-environment to control the fate of mammalian cells
… and bio-chemical factors in the local micro-environment like substrate stiffness, geometry, ligand density, and topography can have strong influences on determining the fate of cells. Mammalian cells respond to this myriad of micro-environmental cues by an interplay between actomyosin …
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The dynamics of surface detachment and quorum sensing in spatially controlled biofilm colonies of Pseudomonas aeruginosa
… the communication among cells (QS). Here we used microfluidics and micro-contact printing, paired with video-microscopy and image analysis, to study several aspects relating to the temporal dynamics of bacterial biofilms. Beyond reporting on specific findings from these experiments, we demonstrate …
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Ordering of Nanoparticles by Wrinkle-Assisted Self-Assembly : Controlling Plasmonic Coupling Effects
… Particularly if structures on the sub-micron scale are desired, electron beam lithography has to be used which involves environmentally harmful etching processes. Within this work we show how controlled wrinkling of a thin rigid film on a soft, elastomeric substrate, can be used as an …
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The Impact of substrate texture on cell behavior
… researchers to design topographical cues at the micro and nanometer scale. In this study, we fabricated fibronectin stripes, which mimic some of the frequent patterns that cells are exposed to in their natural microenvironment, and studied the effects of these patterns on 3T3 fibroblasts and …